Lots. The internet is full of them. Most center around making a habit of periodically doing a "reality check" throughout the day, like reading a word from a note and then re-reading it to check whether it changed or not. I carried a note saying "Wake up!" in the pocket and after a few days of maybe a dozen checks a day, the check (like all daily habits) occurred in a dream. The realization when the inevitable discrepancy is discovered is pretty amazing, because it's so completely unexpected and has such deep implications for the experience of the moment. It's definitely worth experimenting with this stuff.
My method was “look at your fingers”. It’s easy, cause they are familiar and often in sight by default. I remember first time raising my hands and seeing that.
I imagine it would be even more shocking when noticed, but possibly easier to go unnoticed - since visually, morphing is continuous in dreams, but word meanings are discrete and can't morph into one another like that.
Btw. funny (and fascinating) how "dream-rendering" has similar issues with producing realistic hands as LLMs. Similar with continuity issues.
